BenchReference

#59 Drill Bit

Decimal inches 0.0410″
Millimeters 1.041 mm
System Number (wire gauge)

Nearest equivalents in other systems

System Nearest drill Size Difference
Metric 1 mm 0.0394″ / 1 mm −0.041 mm (−0.0016″)
Fractional inch 3/64″ 0.0469″ / 1.191 mm +0.149 mm (+0.0059″)
Letter A 0.2340″ / 5.944 mm +4.902 mm (+0.1930″)
−0.15 mm+0.15 mm#59#61−0.051 mm#60−0.025 mm#58+0.025 mm#57+0.051 mm1 mm−0.041 mm3/64″+0.149 mmA +4.902 mm →tick position = true diameter · number neighbors above, equivalents below · window ±0.15 mm
Positive difference = cuts a slightly larger hole than #59. Sizes beyond the window are listed with arrows — they are not close substitutes.

Neighboring number sizes

Drill Decimal in mm vs #59
#61 0.0390 0.991 −0.051 mm
#60 0.0400 1.016 −0.025 mm
#59 0.0410 1.041 —
#58 0.0420 1.067 +0.025 mm
#57 0.0430 1.092 +0.051 mm
Data provenance. ASME B94.11M, Twist Drills (standard drill size series) (ASME). Millimeter and inch values are converted with the exact definition 1 in = 25.4 mm; the canonical dimension for this number size is 0.0410″. See all data sources.